What Shape Does NF3 Have?

NF3 has a Trigonal pyramidal molecular geometry (AX3E, tetrahedral) with a bond angle of ≈102° (against 107.8° in NH3). The central nitrogen carries 3 bonding domain(s) and 1 lone pair(s) — 4 electron domains in total. Electronegative fluorine pulls bonding electrons away from nitrogen, shrinking bonding-pair repulsion; the lone pair then dominates and squeezes the angle further than in ammonia.

Hybridisation is conventionally described as sp3. Polarity: Slightly polar; the small net dipole points opposite the lone pair, cancelling much of NH3-style basicity.

1. Molecular Identity and Key Parameters

Molar mass is the average value rounded for procurement use. Hybridisation labels are the conventional VSEPR-level description; orbital treatment becomes more nuanced at higher levels of theory.

2. Drawing the Lewis Structure of NF3, Step by Step

1. Count valence electrons: 5 (N) + 3×7 (F) = 26 — a total of 26 electrons (13 pairs) must be placed.
2. Build the skeleton: place the nitrogen at the centre and attach the terminal atoms with single bonds; hydrogen is never a central atom. Each single bond consumes 2 electrons.
3. Complete terminal octets: distribute the remaining electrons as lone pairs on the terminal atoms first (hydrogens already carry their duet from the single bond).
4. Satisfy the central atom: Three N–F bonds plus one lone pair on nitrogen.
5. Verify: Nitrogen carries eight electrons. Apply the standard formal-charge check (valence − nonbonding − half of bonding electrons) to confirm the drawn form.

A worked diagram of this molecule is kept in the companion guide: NF3 Lewis structure.

3. VSEPR Analysis: Why NF3 Is trigonal pyramidal

VSEPR theory counts electron domains — every σ bond counts once regardless of bond order, and every lone pair counts once. NF3 has 4 such domains around the nitrogen: 3 bonding and 1 lone. 4 domains correspond to a tetrahedral electron-domain arrangement; with 1 lone pair excluded from the shape the observed molecular shape is trigonal pyramidal (AX3E).

Bond angle: ≈102° (against 107.8° in NH3) because electronegative fluorine pulls bonding electrons away from nitrogen, shrinking bonding-pair repulsion; the lone pair then dominates and squeezes the angle further than in ammonia.

Polarity: Slightly polar; the small net dipole points opposite the lone pair, cancelling much of NH3-style basicity.

4. The Most Common Mistake When Drawing NF3

5. Why the Geometry Matters in Practice

Plasma etch and chamber-clean gas in semiconductor fabs; environmental handling clauses reflect its very high global warming potential.

Structure-level identity is exactly what a purchase order has to fix: the same molecular formula can hide isomers, hydrates or salt forms with different handling profiles. Before ordering, match CAS (7783-54-2), assay, water content and container rating against the datasheet, and request the COA batch that will ship.

Compare Nitrogen Trifluoride (NF3) supply offers →

6. Quick FAQs on NF3

7. References

1. IUPAC / Gillespie, Assessment of the VSEPR model. Basis of AXE notation and lone-pair ordering. VSEPR entry
2. PubChem compound record for Nitrogen Trifluoride (NF3). Registry number, formula and computed descriptors. PubChem 7783-54-2
3. Companion Lewis-structure guide on this site. Worked diagram for NF3. Lewis structure NF3